Section 219. Rehearings

1.  Whenever  a claim under sections two hundred
  sixteen or two hundred seventeen  of  this  article  is  disapproved  or
  disallowed,  in  whole or in part, the chief of staff shall cause notice
  thereof to be served by mail upon the claimant or his attorney.   Within
  six  months  after  the service of such notice the claimant may apply to
  the chief of staff for a rehearing of his claim.  The chief of staff may
  deny or grant such an application.  If granted, the chief of  staff  may
  appoint,  as  appropriate, another medical examiner or board as provided
  by section two hundred  sixteen  of  this  chapter  or  another  pension
  examining  board  as  provided  by section two hundred seventeen of this
  chapter.
    2. The provisions of subdivision three of section two hundred  sixteen
  and  of subdivisions two, three and four of section two hundred eighteen
  of this chapter shall be  applicable  with  respect  to  claims  reheard
  pursuant of this section.